Use more fpu multi-load/store instructions on ARM.

runtime/vm/flow_graph_compiler_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1595 matching lines @@
     if (destination.IsFpuRegister()) {
       __ vmovq(destination.fpu_reg(), source.fpu_reg());
     } else {
       if (destination.IsDoubleStackSlot()) {
         const intptr_t dest_offset = destination.ToStackSlotOffset();
         DRegister src = EvenDRegisterOf(source.fpu_reg());
         __ StoreDToOffset(src, FP, dest_offset);
       } else {
         ASSERT(destination.IsQuadStackSlot());
         const intptr_t dest_offset = destination.ToStackSlotOffset();
-        DRegister dsrc0 = EvenDRegisterOf(source.fpu_reg());
-        DRegister dsrc1 = OddDRegisterOf(source.fpu_reg());
-        // TODO(zra): Write and use {Load,Store}Q{From,To}Offset(), which can
-        // use a single vld1/vst1 instruction.
-        __ StoreDToOffset(dsrc0, FP, dest_offset);
-        __ StoreDToOffset(dsrc1, FP, dest_offset + 2*kWordSize);
+        const DRegister dsrc0 = EvenDRegisterOf(source.fpu_reg());
+        __ StoreMultipleDToOffset(dsrc0, 2, FP, dest_offset);
       }
     }
   } else if (source.IsDoubleStackSlot()) {
     if (destination.IsFpuRegister()) {
       const intptr_t dest_offset = source.ToStackSlotOffset();
       DRegister dst = EvenDRegisterOf(destination.fpu_reg());
       __ LoadDFromOffset(dst, FP, dest_offset);
     } else {
       ASSERT(destination.IsDoubleStackSlot());
       const intptr_t source_offset = source.ToStackSlotOffset();
       const intptr_t dest_offset = destination.ToStackSlotOffset();
       __ LoadDFromOffset(DTMP, FP, source_offset);
       __ StoreDToOffset(DTMP, FP, dest_offset);
     }
   } else if (source.IsQuadStackSlot()) {
     if (destination.IsFpuRegister()) {
       const intptr_t dest_offset = source.ToStackSlotOffset();
-      DRegister dst0 = EvenDRegisterOf(destination.fpu_reg());
-      DRegister dst1 = OddDRegisterOf(destination.fpu_reg());
-      __ LoadDFromOffset(dst0, FP, dest_offset);
-      __ LoadDFromOffset(dst1, FP, dest_offset + 2*kWordSize);
+      const DRegister dst0 = EvenDRegisterOf(destination.fpu_reg());
+      __ LoadMultipleDFromOffset(dst0, 2, FP, dest_offset);
     } else {
       ASSERT(destination.IsQuadStackSlot());
       const intptr_t source_offset = source.ToStackSlotOffset();
       const intptr_t dest_offset = destination.ToStackSlotOffset();
-      DRegister dtmp0 = DTMP;
-      DRegister dtmp1 = OddDRegisterOf(QTMP);
-      __ LoadDFromOffset(dtmp0, FP, source_offset);
-      __ LoadDFromOffset(dtmp1, FP, source_offset + 2*kWordSize);
-      __ StoreDToOffset(dtmp0, FP, dest_offset);
-      __ StoreDToOffset(dtmp1, FP, dest_offset + 2*kWordSize);
+      const DRegister dtmp0 = DTMP;
+      __ LoadMultipleDFromOffset(dtmp0, 2, FP, source_offset);
+      __ StoreMultipleDToOffset(dtmp0, 2, FP, dest_offset);
     }
   } else {
     ASSERT(source.IsConstant());
     if (destination.IsRegister()) {
       const Object& constant = source.constant();
       __ LoadObject(destination.reg(), constant);
     } else {
       ASSERT(destination.IsStackSlot());
       const intptr_t dest_offset = destination.ToStackSlotOffset();
       __ LoadObject(TMP, source.constant());
@@ skipping 147 matching lines @@
   DRegister dreg = EvenDRegisterOf(reg);
   __ vldrd(dreg, Address(SP, kDoubleSize, Address::PostIndex));
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM